<script setup>
import { ref, watch } from 'vue'
import { registerApi, loginApi } from "@/api/user";
import { useUserStore } from "@/stores";
import { useRouter } from 'vue-router'

const userStore = useUserStore()
const router = useRouter()
const isRegister = ref(false)
const captchaImageUrl = ref(''); // 验证码图片URL
const form = ref({}); // 验证码图片URL
const formModel = ref({
    username: '',
    password: '',
    repassword: '',
    captcha: '',
    captchaKey: ''
})
const rules = {
    username: [
        { required: true, message: '请输入用户名', trigger: 'blur' },
        { min: 5, max: 10, message: '用户名必须是 5-10位 的字符', trigger: 'blur' }
    ],
    password: [
        { required: true, message: '请输入密码', trigger: 'blur' },
        {
            pattern: /^\S{5,15}$/,
            message: '密码必须是 5-15位 的非空字符',
            trigger: 'blur'
        }
    ],
    repassword: [
        { required: true, message: '请重新输入密码', trigger: 'blur' },
        {
            pattern: /^\S{5,15}$/,
            message: '密码必须是 5-15位 的非空字符',
            trigger: 'blur'
        },
        {
            validator: (rule, value, callback) => {
                // 判断 value 和 当前 form 中收集的 password 是否一致
                if (value !== formModel.value.password) {
                    callback(new Error('两次输入密码不一致'))
                } else {
                    callback() // 就算校验成功，也需要callback
                }
            },
            trigger: 'blur'
        }
    ],
    captcha: [
        { required: true, message: '请输入验证码', trigger: 'blur' }
    ]
}

const login = async () => {
    await form.value.validate()
    const res = await loginApi(formModel.value)
    if (res.code != 200) {
        refreshCaptcha()
        return
    }
    userStore.setToken(res.data.token)
    ElMessage.success('登录成功')
    router.push('/')
}
const register = async () => {
    await form.value.validate()
    const res = await registerApi(formModel.value)
    if (res.code != 200) {
        refreshCaptcha()
        return
    }
    ElMessage.success('注册成功')
    isRegister.value = false
}

const refreshCaptcha = () => {
    formModel.value.captchaKey = Date.now(); // 生成唯一的Key
    captchaImageUrl.value = `http://127.0.0.1:5000/getCode?key=${formModel.value.captchaKey}`;
};

// 切换的时候，重置表单内容
watch(isRegister, () => {
    formModel.value = {
        username: '',
        password: '',
        repassword: '',
        captcha: '',
    }
    refreshCaptcha()
})
refreshCaptcha()

</script>


<template>
    <el-row class="login-page">
        <el-col :span="12" class="bg"></el-col>
        <el-col :span="6" :offset="3" class="form">
            <el-form :model="formModel" :rules="rules" ref="form" size="large" autocomplete="off" v-if="isRegister">
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input v-model="formModel.password" :prefix-icon="Lock" type="password"
                        placeholder="请输入密码"></el-input>
                </el-form-item>
                <el-form-item prop="repassword">
                    <el-input v-model="formModel.repassword" :prefix-icon="Lock" type="password"
                        placeholder="请输入再次密码"></el-input>
                </el-form-item>
                <!-- 验证码输入框和图片 -->
                <el-form-item prop="captcha">
                    <el-input v-model="formModel.captcha" :prefix-icon="Picture" placeholder="请输入验证码"
                        style="width: 72%;"></el-input>
                    <img :src="captchaImageUrl" @click="refreshCaptcha" class="captcha-image" alt="验证码" />
                </el-form-item>
                <el-form-item>
                    <el-button @click="register" class="button" type="primary" auto-insert-space>
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = false">
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>
            <!-- 登录相关表单 -->
            <el-form :model="formModel" :rules="rules" ref="form" size="large" autocomplete="off" v-else>
                <el-form-item>
                    <h1>登录</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input v-model="formModel.password" name="password" :prefix-icon="Lock" type="password"
                        placeholder="请输入密码"></el-input>
                </el-form-item>
                <!-- 验证码输入框和图片 -->
                <el-form-item prop="captcha">
                    <el-input v-model="formModel.captcha" :prefix-icon="Picture" placeholder="请输入验证码"
                        style="width: 72%;"></el-input>
                    <img :src="captchaImageUrl" @click="refreshCaptcha" class="captcha-image" alt="验证码" />
                </el-form-item>
                <el-form-item>
                    <el-button @click="login" class="button" type="primary" auto-insert-space>登录</el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = true">
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>


<style lang="scss" scoped>
.login-page {
    height: 100vh;
    background-color: #fff;

    .bg {
        background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
            url('@/assets/login_bg.jpg') no-repeat center / cover;
        border-radius: 0 20px 20px 0;
    }

    .form {
        display: flex;
        flex-direction: column;
        justify-content: center;
        user-select: none;

        .title {
            margin: 0 auto;
        }

        .button {
            width: 100%;
        }

        .flex {
            width: 100%;
            display: flex;
            justify-content: space-between;
        }
    }
}
</style>
